.banner {
    width: 100%;
    height: 850px;
    overflow: hidden;
    position: relative;
}

.banner > ul {
    display: none;
    height: 100%;
    position: absolute;
    top: 0;
    left: 0;
}

.banner > ul > li  {
    float: left;
    height: 100%;
}

.banner ul li img {
    width: 100%;
    height: auto;
}

.img-btn-list {
    width: 100%;
    position: absolute;
    bottom: 10px;
    left: 0;
    text-align: center;
}

.img-btn-list > span  {
    width: 10px;
    height: 10px;
    background: #626262;
    cursor: pointer;
    margin: 0 5px;
    border-radius: 50%;
}

.img-btn-list > span.current {
    background: #fff;
}